Home / 10,911.31-15,059.70-7,127.96

Finding the Fourth Proportional to 10,911.31, 15,059.70 and 7,127.96

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Solution

The fourth proportional to 10,911.31, 15,059.70 and 7,127.96 is: 9,837.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,911.31 : 15,059.70 = 7,127.96 : x
  2. Step 2: Convert to fraction form
    10,911.31/15,059.70 = 7,127.96/x
  3. Step 3: Cross multiply
    10,911.31x = 15,059.70 × 7,127.96
  4. Step 4: Simplify right side
    10,911.31x = 107,344,863.91
  5. Step 5: Solve for x
    x = 107,344,863.91/10,911.31
  6. Step 6: Final answer
    x = 9,837.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.